Traces of Cultus of the Nine Maidens in Scotland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 40, p. 255–265, 1906. DOI: 10.9750/PSAS.040.255.265. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/7059. Acesso em: 26 oct. 2025.